* Allow for zero witness providers
* Verify provider duplicates, fix tests
* Add duplicate provider ID to the error
* Return error on attempt to remove last witness
* Verify duplicates when restoring from store
*light: rpc /status returns status of light client ; code refactoring
light: moved lightClientInfo into light.go, renamed String to ID
test/e2e: Return light client trusted height instead of SyncInfo trusted height
test/e2e/start.go: Not waiting for light client to catch up in tests. Removed querying of syncInfo in start if the node is a light node
* light: Removed call to primary /status. Added trustedPeriod to light info
* light/provider: added ID function to return IP of primary and witnesses
* light/provider/http/http_test: renamed String() to ID()
This pull request removes the homegrown mocks in `light/provider/mock` in favor of mockery mocks.
Adds a simple benchmark only mock to avoid the overhead of `reflection` that `mockery` incurs.
part of #5274
